public function index()
{
$user_id = Auth::user()->id;
$pre = PreReg::where('user_id', $user_id)->get();
$ids = [];
foreach ($pre as $p) {
$ids[] = $p->room_id;
}
$rooms = [];
if (count($ids) == 0) {
$rooms = Room::online()->get();
} else {
$rooms = Room::online()->whereNotIn('id', $ids)->get();
}
return view('customer.index')->with(compact('rooms', 'pre'));
}